In order to use the registry to change what the default webbrowser is, do the folowing;

  1. Open regedit
  2. Navigate to the following registry location: HKEY_Current_User/Software/Classes/
  3. The following 2 keys control what opens .htm and .html pages by default: .htm and .html
  4. Change the value of the keys below to have IE or Firefox be the default web browser used to open web pages.

Web Browser
Name
Type
Data
Internet Explorer
(Default)
REG_SZ
htmlfile
Firefox
(Default)
REG_SZ
firefoxhtml